"My main concern with these SF lights is the fragility of the bulb. Thats why in my backpack there is a spare carrier with batteries and a lamp assy."

I had planned on getting the P61 high-output bulb anyway as a spare. I had thought that Surefires were supposed to be pretty bombproof. If it isn't a lot more robust than a Maglite then I'll have to pass. I'm sure I will manage to drop it occasionally, and replacement bulb assemblies are expensive.

Thanks, Vince